二次元矩形アブレイシブジェットマシニングノズルの加工特性

概要

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Abrasive jet machining is used widely for processing brittle materials. A circular nozzle is used commonly, but the cutting performance of circular nozzle is not so good to process a large area and then the use of a rectangular nozzle, slot nozzle, is considered. Many researchers have been trying to reveal the processing mechanism of abrasive jet machining by experimental and theoretical methods, but it is not known sufficiently. In this study, in order to improve the cutting performance of abrasive jet machining nozzle a new two-dimensional rectangular nozzle with a large aspect ratio is proposed and the cutting performance are examined precisely by experiments. The considerations of mechanism of abrasive jet machining and cutting characteristics are given by experiments. Results show that (1) setting circular cylinder in rectangular nozzle perpendicular to the mainstream and extending the nozzle outlet can process uniformly, (2) larger cutting efficiency is obtained comparing with the conventional circular blasting nozzle for validity of dispersion and discharge on flow of particles, (3) relationships between removal rate and particle velocity, particle diameter and mass loading ratio follow power law, (4) relationship between removal rate and surface roughness of cutting material follows power law independent of any machining conditions.
社団法人精密工学会の論文
2006-01-05